Electric switch



UNITED STATES PATENT OFFICE.

CARL ERIC ANDERSON, F BRIDGE ?CRTv CONNECTICUT, ASSIGNOR TO THE BRYANT ELECTRIC COMPANY, OF IBRIDGEPORT, CONNECTICUT, A

NEC'I'ICUT.

CORPORATION OF CON- ELECTRIC SWITCH.

Specification of Letters Patent,

Patented July 19, 1921.

To all whom it may concern:

Be it known that I, CARL ERIC ANDERSON, a citizen of the United States of America, and residing at Bridgeport, in the county of liairfield and State of Connecticut, have ini'ented a certain new and Improved Electric Switch, of which the following is a specification.

My invention relates to electric switches and particularly to switches of the flush typo generally used for controlling lighting or other local circuits. The object of my invention is to provide a simplified and improved mechanism which is eflicient and 1 i-icrviceable in operation accon'ipanying drawings, are l is plan, partially in sec n, ofa l in which my intention is embodied in Referring to the FT is a lliuigitudii'ial section there-- tin-(nigh onthe lines Fig 1;

hi is a detached perspective of the se er switch elements; and

Fig; 4 is a perspective of one of the c0mbined wire and switch terminals.

The switch in the form here shown comprises a cup-shaped insulating body 10 haw ing a yoltc Ill. which extends longitudinally across the open face of the body and is held in position by screw bolts 12, and by which the switch may be mounted in any suitable outlet box (not shown). A cover plate 13 of ordinary type is secured to the yoke by screws 1 L The corners of the body 10 are depressed to afford apertures 15 through which connecting wires may be led to the wire ter minals 16. The latter are secured by screws 17 passing through the bottom of the cup and taking into tapped holes in the foot piece 18 of each terminal. Switch contacts 19 extend into the switch chamber 20 from the wire terminals 16 and cooperate with the switch blades 21. In. the present construc tion the switch is shown as of the double-- pole type, although obviously by omitting one of the switch blades. and the correspond- 111g wire tern'iinals and. switch contacts it becomes a single pole switch the mechanism of which is otherwise the same.

Extending into the switch chamber ribs at each end of the insulating body 1.0, channeled at 23 for the major portion of their depth to form ledges which receive the securing lugs 24 of the switch frame 25.

port the switch mechanism. The switch mechanism proper comprises a pair ofpush buttons 27, the shanks of which are angled toward each other at their inner ends and provided with lugs 29 adapted to engage in holes 30 on opposite sides of the axis 31 of a rocking member which. comprises a pair of similarly shaped plates 32. The latter are mounted between the standards on the pivot pin 33 which passes through the holes 34; in the standards and the holes 31 in the plates 32. The shanks :28 of the buttons form spacers between the plates and are of such width that the plates 32 are held close to'the standards 26. There is consequently no danger of the lugs 29 es caping the holes 30 after the rocker plates hare been assembled with the push buttons and frame and mounted upon their pivot pin Each plate 32 has a lug 35 extending outward from a point midway between the arms to which the push buttons are attached and pierced at to receive a cross pin. 37 which serves as an abutment for the switch spring 38. The latter is coiled upon a guide pin 39 comprising a pair of straps of like shape spaced adjacent the end 40 to afi'ord a limited freeway for the cross pin 37 and provided at their opposite ends with registering cross arms ll which form an abutment for the opposite end of the spring 38. The head 42 of the cross pin enters the slot 4.8 in the yoke 4% which carries the switch blades 21. The two straps of the guide pin 39 are held together by the coil spring 38 slipped thereover and the abutment pin 37 may be inserted transversely after a slight compre sion of the spring 38 against the cross arm. 41.

The switch yoke 44 carries at its open end a pair 01" oppositelyiaced pivot studs 45. In the assembled position of the switch these studs rest in open bearings 4-6 formed in the outer ends of the standards 26 by offsetting apart the free ends of the latter and carrying the slots 47 which form the open bearings y yoke 26,' it is push oscillation of the ;1'."iLCl1 yoke ossible to assemble theyoke on the l. nine ii merely slipping the studs along the shoulders 48 until they enter the slots 2', after which they are automatically seated in their bearings 46 and maintained therein by the pressure of the switch spring The free ends of the standards 26 are fan-shaped and provided with shoulders 4.9 which form stops against which the yoke 4 comes to rest in its extreme position. The thyow of the rocker plate 32 is limited by the in'nyin ment of its push button arms against. bottom of the frame The operation of the switch is readily understood by referring to Fig. 2. To open the switch, the right hand button 27 is (l, with the resultthef. the arm 35 t the rec plate 32 is swung); up and past. the axis oi 44;, whereupon. the oressure of the spring 38 (now compressed) is exerted in a direction to throwthe switch yoke 4% to l'le left, thus moving the blades 21 out of contact with switch terminalsfl'lo. To again close the switch the left hand push lnittoin which is now up, is depressed with a resulting BEYOF- sal of the action ust described.

Various modifications of construction will readily occur to those skilled in the Without departing from what l claim :is my invention.

I claim my invention 1 itin electric s viteh comprising; 1! on shaped ie'ctzinggnlsn body of; illfilllktl'ill; f nut teiinl haying; st its opposite ends i'ihs ex tending into the snitch chamber, (lo n-erased ledges terminal by channels in Silltl rihs, tl sv Lch l rzntne having 1t hose testing; against the i 'ion'l of the switch uhmnhei :nnl unwordly on 'loz enil hogs overlying and secured t --'-le -'i, :-J:in l:n'rls i'isingg from the opposite snh mid hose and having open howling. immwl theiein, :1 melon pivto said Hiltl'ltlili'i'iffi -.z, l in"0.nt the l)..

in, piece pivotmi ir .Elllll o m; lien:-

kli'ltiillii" shove l L xiv: of the 1 her. 2-; switch i in; ones holy inlwnoseii l t tween said rocket znnl :nrili'h pit-v0 and mom: in for ilt'filllltlll g" snhl review, [or the pun pose (lest: ihoii. i

in ti.,.,'m.ony n'hoi'eol' l have signed my heme toiilis specification, in the piwvneu two snlnm'ilrin nitiwsses.

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